Cathode tube recorder for calculating machines



June 1, 1943. J. w. BRYCE 2,320,337

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Patented June 1, 1 943 CATHODE TUBE RECORDER FOR CALCULATING MACHINES James W. Bryce, Glen Ridge, N. J., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application June 30, 1939, Serial No. 282,208

22 Claims.

Record controlled accounting machines of the types now in use usually comprise record han dling mechanism, record analyzing devices, calculating devices and recording mechanism, The recording mechanism is sometimes used to list data derived from each record of a run and at other times is used to record only the results of calculations and at other times such recording mechanism is used to record a list of detail data together with result data derived from the calculating mechanism.

In all such machines high overall speed of operation is a desideratum. Quietness of operation is also demanded by users.

According to the present state of development of the art it is possible to handle and analyze records at very much higher speeds than the speed attained in commercial practice today. Accumulator development has also afforded accumulators which are capable of operating accurately at very much higher speeds than now generally used in commercial practice.

Recording mechanisms, however, as now commercially used, involve type elements such as bars or wheels, each of which is provided with a plurality of type characters. Furthermore, it is the customary practice in power actuated accounting machines to provide a separate type element for each column of data to be recorded. Such type elements all have to be individually differentially positioned or set and after an impression is taken therefrom the elements have to be restored to home position before they can be reset for succeeding printing operations. Such operations are necessarily time consuming. The weight of the moving type elements is considerable on account of the number of columns of data to be recorded and on account of the number of type characters on each element,

The foregoing factors all contribute to limit the possible maximum speed of operation of the recording mechanism. Paper handling mechanism and the impression taking devices are also of such nature that they tend to limit operating speed. Furthermore. in the operation of such machines the elements of the recording mechanism when in operation, are a source of considerable noise which is objectionable to users. Change of type characters in the present day commercial machine is also time consuming and costly.

While there has recently been intensive development in printing and recording mechanisms with an endeavor to lighten the parts, provide higher operating speed and more quiet operation, no recording mechanism has been devised to date which affords overall operating speed equal to that attained in commercial practice by existing calculating mechanism, card handling and analyzing mechanisms. Furthermore, the best of recording mechanisms have maximum operating speeds materially below those attainable with improved card handling and calculating mechanisms which are now available. In short, at the present time in machine accounting operations which involve recording, it is always the printing mechanism which determines the upper limit of operating speed and in the present state of development in the art the related other mechanisms frequently have to be slowed down to accommodate the relatively slow recording mechanism.

The present invention has for one of its ob- .jects the provision of an improved record controlled accounting machine with improved and novel recording means which enable recording to be effected at higher speeds than heretofore.

A further object resides in the improvement of machines of this class and in the improvement of the recording mechanism of such machines to the general end that recording maybe effected at even higher speeds than calculating speed.

A further object of the present invention resides in the provision of a relatively noiseless recording device for an accounting machine.

A further object of the present invention resides in the provision of a record making accounting machine wherein provision is made to wholly dispose with differentially movable and settable parts in the number or character representing means of the recording mechanism.

A further object of the present invention resides in the provision of an improved recording mechanism for an accounting machine wherein there is practically no upper limit to the number of characters which may be provided in any one columnar order.

A further object resides in the provision of a construction wherein the recording characters may be readily changed or increased or decreased in number for any given column.

A further object of the present invention resides in the provision of a novel visual indicator .1" or affording a clear and brilliant reading of a total calculated by the machine.

A further object of the present invention resides in the provision of a record controlled calculating machine provided with a recording apparatus adapted for providing an extremely compact record of items and/or totals. 

